Adjustable joint for electric-light fixtures.



E. PJPIERGE. ADJUSTABLE JOINT FOR ELEGTRIG LIGHT FIXTURES.

. APPLIQATION FILED APR; 12, 1909.

UNITED STATES PATENT ()FFICE.

EDWIN I. LPIERCE, OF MILWAUKEE. WISCONSIN.

ADJUSTABLE JOINT 'FOR ELECTRIC-LIGHT FIXTURES.

Specification of Letters Patent.

Patented Oct. 25, 1910.

Application filed April 12,1809. Serial No. 489,497.

To all whom it may concern:

Be it known that. I, EDWIN F. PIERCE, a

citizen ofthe United States, residing at Milwaukee, county ofMilwaukee,'and State of Visconsin, have invented new and usefulImprovements in Adjustable Joints for.

Electric-Light Fixtures, of' which the following is a specification.

My invention relates to improvements in adjustable joints for electriclight fixtures,

and it pertains to. that classwhich are used either with'or without'ga'spipe connections. The construction of my device is explained byreference to the accompanying drawings,

in which Figure 1 represents a vertical section and Fig. 2 .is abott-ornview-of an uriin'sulated adjustable fixture-adapted to be connecteddirectly with the ceiling of. a room. Fig. 3 is a vertical section andFig. 4 is, a bottom view of an insulated adjustablefixture, alsoconnected with the ceiling of a room; and

' tom view of a combined gas and electric- Fig. dis a vertical sectionand, Fig. 6 a botlight fixture with' an adjustable insulated hanger. g I

Like artsare identified bythe same reference figures throughouttheseveral views. 1 is a-tubula'r hanger Which isprovided at its lower endwith a screw threaded bearing 2,by which it. 'is adapted to be, coupledwith a chandelier, lamp, or other light'fixture ofordinarycons'truction. The upper end of thehanger 1 is provided with a sphericalshaped member :3, which together with the cup shapedbrackets forms aso-called ball and socket joint, which permits the hanger to be-freelymoved or swung in any direction, as may be required to bring the hangerand fixture suspended therefromto the vertical regardlessfofu the unevensurface of the ceiling, or thefact thatthe supporting" bracket is'out.of plumb. The'lower end: of the bracket 4 diverges outwardly forming anannular flange 5 ter- -m-inating at a" distance from the lower end ofthe hanger 2', whereby the-required space is provided'betweenthe hangerand the on posing surface of the annular flange for the proper movementof thehanger to bring the same to the vertical as stated. 1 The annularflange 5. is rovided with a plurality of set screwsfi, w ichcontactwiththe lower end of the hanger 2 and serve to hold the hanger,wh'enadjusted in its proper. position; The bracket 4 is open at the top,whereby the hanger 2 is provided at its upper end with an outwardlydiverging fiangeS and is surrounded with 'a spherical shaped insulatingbearing 9, thc'exterior surface of which conforms in shape to theopposing bearing surface 10 of the bracket and the two parts 00- operateto form an insulated ball and socket joint, which permits of the lowerend of the hanger 2 being inclined as may be required to bring thefixture suspended therefrom to the vertical beneath the bracket.

In the form shown in Figs. 5 and (3, the

annular fastening'plate 7 is dispensed with and the upper end of thebracketet is provided with a threaded coupling sleeve 11,

which isada'p'ted to be coupled to the endv of a gas pipe frorn'whichthe' fixture is adapted to be suspended. Thecoupling 11 is-provided'with screw threaded bearings .12, with which. it; is connected with asimilar threaded bearing formed" in the upper end of the bracket 4. 13is an inwardly diver in'g iannular-collar, which is connected r wit 1the inner wall of the coupling 11 and terminates. centrally above thecentral duct 14 of the-ban er 2, whereby such" moisture as may arise romcondensation in the gas pipe will be caused to drip into't-he duct 14:o'ftlie'hanger. The opposing surfaces of the insulation 9 and thebracket 4 are so ground the hanger 2 and the lower end of, the couplingl1 and serves to retain the hanger: in close contact with thexsupportingbracket,

caping is thereby prevented.

I am aware that 1i ht fixtures have heretofore been suspende from balland socket joints, the sockets of which have been '95. a'sto form atight joint'and a spiral spring .15 is interposed between the upper endof formed in two parts adapted to be separated horizontally at thecenter of the ball for the reception of the latter. 'By 111improvemerit, however, the socket or so ca ed bracket .is made open atits. upper side for the recep-' hanger and for this. reason it tion of te whereby a tightjoint is maintained between such parts and theliability of the gas esbecomes unneeessar to form thebracketinconstruction made into member provided at vthe. junction of such andretai'n- 'the same at any desired point or- --tures of -he clamdescribed, the combmation a downward y 5Q'member of a ha and 6 of thedrawings, whereb the I anger 'ters Patenti is'- lower side with adownwardly diver member-of such hanger, and at the junction of suchrecesses with an aperture forthe v hanger,

in shape and ada such arts are by my a 1y, whereby the construction issimplied and expense of manufacture diminished. 1

To prevent the hanger 2 and the spherical member connected therewithfrom turning in the supportin bearings of said bracket, I have providesaid bracket'and hanger with closel fitting angular bearings, which arelocate at the junction of the spherical member withthe c" lindricalmember of such, hanger, as more 0 early shown in Ei s. '2, 4

separable parts an is prevented from turning in t e bracket as a gaspipe or other fixture is being secured thereto.- Having thus describedmy invention, what I claim as new, and desire to secure by Let- 1. In 'aevice of thedescribed class, the combination of a bracket provided onits upper side 'with a downwardly converging spherical shaped recess forthe reception of a spherical member of a hanger, on its re cess for vthereception of the cyllnd ical reception 10f. the-angular bearings of thea hanger comprising an upper spherlcal member and a lower cylindrical;

memberswith-a ular bear' sconform".

ted to fit 1n%o the angu l a bearings of Y sai, aperture, whereby: said,hangKer is prevented from turnin with said brac st and a plurality ofradia adjustable screws havin tlirea ed beari in. the

downwardly ivergin'g walls of sa d bracket 3 adapted to' infii-nge-attheir inner ends against the feentra' member .of said hanger adjstm t P 2.: In adj us'table' joints for electric light fi'xof a bracketrovided on its u per side with 4 v nvergin sp erical shaped recess forthe receptiono? a spherical shaped. er',;and on-it-s lower sidetrallyabove t .tion of a-bracket provided on its hearings in the up'per'si of,sai

I of said with ,a downwar I, y diverging recess for the reception of thecylindrical member of such hanger,- a hen ercomprising an L1 lowercylindrical member suspended in said bracket, a screw threaded eouplinhavin threaded bearin s in the upper sidfi of mi bracket provided at itslower end with downwardly conver mg flanges terminating e centralaperture 0 hanger -and adapted to said ing threaded bearings in-- the-downwardly diverging ed to the central member of said hanger and retainthe same at any desired pointof-adjustment.

L a In adjustable joints for. electric li ht scharge. liq'uid'. moisturefrom above into saidaperture, anda plurality of radialadjustable'screwshavwalls of said bracket and adaptimpinge at theirinner ends against pper spherical shape insulating member an 'a Gen-'-.1

fixtures of the class described, the combinai with a downwardlyconvergintg spherical shaped recess for the reception 0 a sphericalshaped member of a hanger, and on its lower side witha downwardlydiverging recess for upper side a the reception of the cylindricalmember of such hanger, a hanger comprising an upper spherical shapedmember and a lower cy lindrical member suspended in said' bracket,

a screw thrcided-couplin having thr'eaded provided at'its-lower'e'n'dconverging fia above the centra a spiral wire s screw threade couplingand the spherical memberfof said hanger, aplurality of radial adjustablescrews,

aperture of said hanger,

necting said bracket with the ceil'in of a tures from said hanger, a

In testimony Witnesses:

e of. said bracket with. downwardly, es terminating centrally ringinterposed between said having threaded bearin' s in. the downwardlydiverging walls- 5 bracket and adapted to. impinge at their inner "endsagainst the central member hanger and retainthe same: at; any desiredpoint of adjustment, means-for eons 1 room and means- :for sus endinglig t fi'xsubstantially as and for the. purpose specified. i, .1:

whereof I aifix-myslgnature in the presence of two witnesses.

' Y EDWIN F. PIERCE,

